Hi Stig,

Thanks for bringing this to us.
I'm +1 for backporting to 3.9 branch since there's no workaround for Java
24.

Thanks.
Luke



On Tue, Mar 18, 2025 at 1:14 AM Stig Rohde Døssing <stigdoess...@gmail.com>
wrote:

> Thanks Ismail,
>
> I've opened https://github.com/apache/kafka/pull/19221 just to get any
> test
> failures out of the way in case it is decided to do this backport.
>
> I'm hoping people will weigh in with their concerns in this thread if they
> don't like the idea of backporting this change.
>
> Den man. 17. mar. 2025 kl. 16.43 skrev Ismael Juma <m...@ismaeljuma.com>:
>
> > Hi Stig,
> >
> > Kafka 4.0 is likely to be released in a day or two. Even so, I think it
> > makes sense to revive the backporting thread given the lack of workaround
> > for Java 24.
> >
> > Ismael
> >
> > On Mon, Mar 17, 2025 at 7:44 AM Stig Rohde Døssing <
> stigdoess...@gmail.com
> > >
> > wrote:
> >
> > > Hi,
> > >
> > > Some months ago, a reflective shim was added in
> > > https://issues.apache.org/jira/browse/KAFKA-17078, in order to support
> > > running Kafka with SASL on JDKs that no longer support the security
> > > manager.
> > >
> > > This shim was added only to Kafka 4.0, but backporting was discussed in
> > > https://lists.apache.org/thread/vl43q9wqq4xs67xx61f0t0850y2b037o.
> There
> > > was
> > > no clear consensus for or against backporting, but it ended up not
> > > happening. At the time, users could work around the issue by enabling
> the
> > > Security Manager again via a command-line flag.
> > >
> > > Java 24, which is planned to release tomorrow, no longer has this
> > > workaround available.
> > >
> > > This leaves users running Java 23 (I am one) in a slightly
> uncomfortable
> > > spot.
> > >
> > > If Kafka releases 4.0 in the next month, we can rush to upgrade to
> that,
> > > and hope that the first release has no regressions.
> > >
> > > Otherwise, we will need to downgrade back to Java 21, since staying on
> 23
> > > isn't a good idea past Oracle's quarterly security update in April (see
> > > https://www.oracle.com/security-alerts/), which will include patches
> > that
> > > won't be released for Java 23.
> > >
> > > Would there be strong objections to attempting a backport of this shim
> > to a
> > > 3.9.x release?
> > >
> >
>

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